Improved vulcanizing-flask



D. J. PEER.

Vulcanizing Flask. No. 53,667. Patented April 3, 1866.

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D. J. PEER, OF ROCHESTER, NElV YORK.

IMPROVED VULCANIZING-FLASK.

Specification forming To all whom it may concern:

Be it known that I, D. J. PEER, of Rochester, in the county of Monroeand State of New York, have invented a new and useful DentalVulcanizing-Flask; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, making part of this specification, in whichFigure l is a top view or plan of the nowel N with its bolts Z) swungoutas while the model of the mouth, teeth, &c., are being put in orremoved. Fig. 2 is asimilar view of the cope B of the flask. Fig. 3 isan inverted view of the corflng-plate P. Fig. 4 is a vertical section ofthe parts in adjustment for use.

Like letters indicate corresponding parts.

This invention consists in the construction of vulcanizing-flasks fordentistry purposes in such a manner that the parts may be securedtogether by two swinging or hinged bolts attached to the nowel, the nutsof which only require two or three turns in closing or opening theflask.

To enable others to make and use my invention, I will describe itsconstruction and operation.

I use the ordinary two-part flask with a coping-plate, P. The base ornowel N, I provide with arim, R, of suitable depth. On two oppositesides I make an enlargement, c, within the circle, on which are cast theears a, to which the bolts Z) are pivoted. These ears also act assteadypins or guides for the cope or section B. The coping-plate P isalso provided with guides 0. These guides a and 0 cause the parts alwaysto register or close together the same way every time, which isabsolutely necessary in portion of the process of making teeth.

The three parts N, B, and P of the flask are all provided with anobvious mark on one side, and that of each must be placed in conjunctionwith the others when they are put together. hen the cope and properlyarranged the flask is placed in the screw-clamp,

part of Letters Patent No. 53,667,

dated April 3, 1866.

hereinafter described, and together. The bolts b are then raised to theposition shown in Fig. 4, and the nuts 12 firmly screwed down upon thecopin g-plate, the points s of which, on each side of the bolts, areslightly elevated above the general plane of the plate. This causes thenuts n to tend to draw inward instead of outward, which they might do ifthe bearing were flat. The offsets within, made by the bolts 1), 850.,do not interfere with the insertion of the model of the mouth, teeth,&c.; but by such a disposition of those parts, there being noprotuberances beyond the circle of the flask, it is much more easilyplaced in the heater or removed from it than the flasks in common use.

After the model of the mouth or mold con taining the teeth, 850., isproperly placed in the flask and the cope set on, it is essential thatthe parts should be compressed by a direct pressure, as a torsal strain,or one side being pressed down faster than the other, is almost certainto spoil thejob. This preparatory clamping of the flask I perform with ascrew-clamp composed of an iron disk of suitable size, to which is casta strong bail or arch ot'sufficient height to receive the flask. Theclamping-screw, which is in the center of the bail, is then screwed downagainst the copingplate of the flask, causing a direct pressure 0ttherubber on the model of the mouth. The bolts 1) are then raised to theirvertical position and the nuts n screwed down so as to catch and retainwhat was compressed by the screw-clamp.

What I claim as my invention, and desire to secure by Letters Patent,is-

In combination with the nowel N, plate P, cope B, or its equivalent, theswinging or pivoted bolts 11, arranged and operating substantially inthe manner and for the purposes shown and described.

D. J. PEER.

the parts pressed Witnesses:

WM. S. LOUGHBOROUGH, P. T. TURNER.

